High-efficiency gas extraction technology of staged fracturing roof with sand of underground broken and soft coal seam
The gas extraction method of floor cross-layer drilling commonly used in gas control of broken and soft coal seam has problems such as large excavation quantity, long control period, short coal uncovering section of drilling, limited extraction control effect and so on. The gas extraction method of...
| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Industry and Mine Automation
2022-12-01
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| Series: | Gong-kuang zidonghua |
| Subjects: | |
| Online Access: | http://www.gkzdh.cn/article/doi/10.13272/j.issn.1671-251x.18050 |